Anthropic appears to be upgrading Claude's voice mode, as selecting Opus or Sonnet now routes voice conversations through those models instead of falling back to Claude Haiku 4.5, which has not been refreshed in some time. The model selector has been inside the voice interface for roughly three weeks, but until now the choice was cosmetic. The picker currently exposes Opus, Sonnet, and Haiku, with a control for setting the thinking level beside it. Claude Fable, the company's Mythos-class model, is absent from voice for now. The pipeline remains text-to-speech rather than a speech-native model: Claude handles reasoning and drives the conversation, while spoken output appears to lean on ElevenLabs, the same subcontractor listed since the feature launched. In testing, interruption handling held up: the model pauses when it hears you and resumes sensibly, and it tolerated long silences without cutting in early. No formal post has appeared, though the functional switch behind the selector suggests one is close. (*This feature is not yet available to the public and is currently hidden under a feature flag).